MCL 339.2404B
(vii) Construction safety standards promulgated under the Michigan occupational safety and health act, 1974 PA 154, MCL 408.1001 to 408.1094.
(2) All of the following apply to an individual license under this article, as applicable:
(a) Subject to subdivision (b), if the individual licensee obtained his or her initial license as a residential builder or a residential maintenance and alteration contractor on or after January 1, 2009, he or she must successfully complete at least 21 hours of activities that demonstrate continuing competence in each 3-year license cycle, including both of the following:
(i) At least 3 hours of activities that demonstrate continuing competency in each calendar year, during the first 6 calendar years of licensure.
(ii) At least 3 hours of activities designed to develop a licensee's understanding and ability to apply state building codes and laws relating to the licensed occupation, safety, and changes in construction and business management laws.